Reinforced paper-board box.



E. M. HAWKINS.

REINFORCED PAPER BOARD BOX.

APPLICATION FILED JUNE 1. 1914.

Patented Oct. 26, 1915.

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EDGAR M. HAWKINS, OF ROCHESTER, NEW YO AssIeNOR TO M. n. K owL'rON COMPANY, or ROCHESTER, NEW YORK, A CORPORATION OF NEW YORK.

REINFORCED PAPER-BOARD BOX.

Application filed nine 1, 1914 To all whom it may concern:

Be it known that I, ,EDGAR M. HAwKINs, citizen of the United States, and resident of '15 board boxes, and the main object of the invention is to provide an improved construction which will permit boxes of this class,

reinforced peripherally by multiple-ply strips or folds formed from the the material of the box proper, to be bent readily without cracking, breaking, or otherwise in uring the material of the box when so bent.

As is Well known, paperboard boxes made from solid or corrugated board have been long 111 general use as containers or cartons for holding varlous kinds of goods. Until v recently, however, these boxes have as a rule been formed each from a blank so cut and shaped as to be capable of being set up in box form but having, when so set up, only the strength of a single ply'or thickness of material. In order to meet the demand for a strong box made from paperboard in such a manner as to be capable of being shipped flat and readily set up thereafter in box form, boxes are now made from this material in a manner similar to that in which they have always been made, but with an additional ply or plies of material at the points where additional strength is desirable. These points are usually at or adjacent to the edges of the boxes. Reinforced boxes of this class as now made have several plies of material at each of the points, or along each of the lines, where additional strength is re quired, these plies being generally formed from the material of the box blank by properly folding the blank along the desired lines to produce multiple-ply strips or folds wherever such additional strength is required, said multiple-ply folds being held together in some suitable manner, as for example, by metallic staples.

In this type of reinforced or strengthened paperboard box, capable of being shipped flat, as are the ordinary or unreinforced boxes or blanks, 1t has been found that it is difficult to set them up without cracking or breaking the material in or adjacent to each line of reinforcement for the reason that Speoification of Letters Patent.

Patented ott. as, item. Serial No. 842,229.

where several plies of relatively thick paperboard are located in such line it is very difcult to bend the blank in setting up the box without breaking or cracking at least one of the plies in that line. i

he principal object of this invention is to provlde an improved box of this new or reinforced type in which the box presents an unbroken exterior with the material reduced in the line of reinforcement at the corners of the box. This result isobtained by prop erly cutting out the material of one or more plies of the reinforcement in the lines of the :corners at which the material of the main blank is to be folded.

Otherfeatures of the invention not hereinbefore referred to will be hereinafter described and claimed and are illustrated in the accompanying drawings, in which,

Figure 1 illustrates a reinforced paperboard box partly finished and partly in its blank form, having the material of the reinforcement so cut out in the lines of the corners where the blank is to be bent as to reduce the number of plies of the reinforcement at such points, Fig. 2 is a perspective 'view of the finished blank set up in its finished box form; Fig. 3 is an enlarged detail partly in section and partly in perspect1ve showing the appearance of the outside of a reinforced corner of the box at the bottom thereof; Fig. 4 is a similar View looking into the inside of said corner and illustrates how the edges of the inner plies of material at a cut-out are brought up close to each other without strain on the outer ply; Figs. 5 and 6 aresectional details, the sections being taken in each instance in line w-x of Fig. 4, the former showing the box opened out Hat and the latter illustrating the positions of the parts when the box is in. its set up condition; and Fig. 7 is an enlarged sectional detail, the section being taken in line 'w-'w of Fig. 1, showing the manner in which the multiple plies are secured together and the material adjacent thereto creased for bending.

Similar reference characters designate like parts in all the figures of the drawings...

' In carrying the invention into effect a this kind is usually creased, as,

-blank. lines 7, 8, 9, 10,

. forcing strips or erally, that is, from end metallic staples tiple-ply reinforcing strips disposed transby other tially around the finished box when setup, there being ordinarily a plurality of these reinforcing strips or folds disposed in parallelism. A blank of this type, substantially complete and infiat form ready for shipment, is illustrated in Fig. 1. Except for one reinforcing strip or fold the blank thus far described the box or blank is substantially of 'sual construction.

As shown in Fig. 1, the blank is adapted to be bent along suitable lines, such as 131 1 and 15-16, to produce multiple-ply reinfolds extending substantially completely around the box periphto end of the blank. The upper reinforcing strip or fold in Fig. 1 has not beenformed, the three lines 13, 14:

and 17 indicating the extreme limits of the strip andalso the bending lines; lower reinforcing strip in said figure 18 combut the pletely formed and the plies of material are secured together in the usual manner, as by 18. A blank with such mulversely to the corner bending lines 3, 1, and

p 6, indicating the the line moval of sectionsof one or more plies 5 of the blank and parallel with each other and located at or adjacent to the crease lines, edges at which each side or end panel is joined to a top or bottom panel,

constitutes a reinforced paperboard box or blank capable of shipment flat, as before described.

The pr ncipal feature of the present invention consists in so forming a paperboard blank of the type just described that it will be capable of being folded to form a box having an unbroken external surface with the reinforcing strip reduced, preferably in of each corner of the box, by the re} material to permit the blank to be bent propf the plies are cut out in except one.

' multiple-ply erly in each such line.

reinforcing material may be properly bent it has been found necessary to cut out one or more plies of material in the line of each corner of the box at which the material is to be bent in setting up the box, the best construction being one in which all the line of the bend The material may be cut out in a'variety of ways. In Fig. 1 the material to be removed is eliminated by cut-outs each said zone (as shown at Fig. 1) when the will be seen at the the reinforcing strip is illustrated as finished In order that the wider at the center than at the ends, as shown at the upper part of said figure, whereby, when the fold is formed, as shown at the lower part of said figure, openings are provided which are widest at the points of greatest thickness of said folds in order that the edges of the openings may be brought together properly when the box is set up without causing any strain on the uncut ply, which in the present case is the outermost I ply. The cut-outs are designated by 19 and 20. As here shown they are diamond-shaped and so located as to lie partly in the zone of the reinforcing strip and partly outside of the upper side of blank is flat, that is, has not been folded to produce the reinforcing strip; but after the reinforcing strip or fol-Ll has been formed, these diamond-shaped cutouts form triangular openings that lie wholly within the zone of reinforcement, as lower side of Fig. 1 where and stapled. By referring particularly to Figs. 1 and 4, it will be seen also that each triangular opening has its narrow and wide portions respectively at opposite edges of the reinforcing zone and in the planes of single and multiple plies respectively, the construction being such that sufficient space is provided at the wide end of the opening to accommodate the greater thickness of the multiple plies at that point when the blank is i bent in setting up the box.

The relative positions of the inner ends of the slits 7 S, 9, 10, 11 and 12, with respect to the diamondshaped cutouts in alineinent with said slits are clearly illustrated in Fig. 1, each slit being separated from the adjacent cut-out by a segment .9 of the blank which, when the reinforcing fold is formed, becomes a portion of the outermost ply of said fold, whereby the exterior ply of the finished reinforcing fold is maintained unbroken.

Fig. 2 shows the appearance of a set-up box formed from the finished blank of Fig. 1, the reinforcing strips or folds, indicated at 21 and 22 in this view, extending completely around the box and the construction being such that the external surface of the box is unbroken.

Figs. 3 and 1 illustrate on a larger scale and more in detail the appearance of a corner of the box both externally and internally at a point where two plies of the three-ply reinforcement illustrated have been removed to permit proper bending, 2'. 6., bending without strain on the outermose ply at s such as might tend to break or crack the same.

What I claim is 1. A paperboard box, comprising a main sheet and an integral reinforcing strip forming a plurality of plies presenting an unbroken external surface, at least one of said members being cut out in a bending line of the box to reduce the number of plies at that point.

2. A paperboard box, comprising a main sheet and an integral external reinforcing ing an unbroken external surface, at least one of said members being cut out in a bending line of the box to reduce the number of plies at that point.

3. A paperboard box, comprising a main sheet and an integral external reinforcing strip forming a plurality of plies presenting an unbroken external surface, at least one of said members being cut out in a bending line of the box to leave but a single ply of material in said line.

A. A paperboard box, comprising a main sheet and an integral external reinforcing strip forming a plurality of plies and extending peripherally around the box and crossing a plurality of corners thereof and presenting an unbroken external surface, at least one of said members being cut out in the bending line of each of said corners to reduce the number of plies in said line.

5. A paperboard box, comprising a main sheet and an integral external tWo-ply reinforcing strip extending peripherally around the box and crossing a plurality of corners thereof and presenting an unbroken external surface, both of said members being cut out in the bending line of each of said corners to reduce the material to a single ply in said lines.

6. A paperboard box, comprising a main sheet and an integral reinforcing strip forming a plurality of plies presenting an unbroken external surface, at least one of said members being cut out in a bending line of the box to reduce the number of plies at that point, said box being slitted at its edge in line with said cut-out to form end-flaps.

7. A paperboard box, comprising a main sheet and a tWo-ply external integral reinforcing strip, said box having an opening extending through the main sheet and the Copies of this patent may be obtained for five cents each,

strip forming a plurality of plies presentinner ply of the reinforcing strip in a bending line of the box, and a slit in the edge of the box in line with said opening and separated therefrom by the unbroken external ply of said strip.

8. A paperboard box, comprising a main sheet and an external tWo-ply reinforcing strip forming a multiple ply construction the inner plies of Which have angular openings in the bending lines of the corners of the box With the Wide and narrow portions of the openings adjacent opposite edges of the reinforcing zone and in lines respectively with single and multiple plies of the same.

9. A box blank provided With a plurality of transverse bending creases terminating in slots forming the end flaps, the blank being provided on the bending creases With apertures, there being one aperture for each slot and each aperture being spaced from the end of the corresponding slot, for the purpose described.

10. A box blank having a plurality of transverse bending creases and adapted to be folded longitudinally to form a reinforcing strip, said blank being provided with an aperture on each bending crease to reduce the thickness of the material in the reinforcing strip at each bending crease.

11. A box blank having a plurality of bending creases terminating in slots forming the end flaps and adapted to be folded longitudinally and at right angles to said creases and slots to form a reinforcing strip, said blank provided With an aperture on each of said bending creases and in the Zone of the reinforcing strip to reduce the thickness of the material in the reinforcing strip at each bending crease.

Signed at Rochester, in the county of Monroe and State of New York, this 23d day of May, A. D. 1914;.

EDGAR M. HAWKINS.

Witnesses THOS. D. PATTON, Cnnsrnn B. PEARSALL.

by addressing the Commissioner of Patents,

Washington, D. G. 

